Saber-class Servant seen in Fate/Grand Order. The Knight of White Lilies, their Noble Phantasm is Fleur de Lys.
d'Eon's gender is not identified, and they possess a skill that allows them to switch between the two. d'Eon's real life counterpart was biologically male and crossdressed while undercover as a spy before transitioning to living as a woman later in life. They briefly wear a purple maid uniform during the Agartha chapter.
